Groundwater in Baker County contains arsenic, chloride, and E. coli that well owners should monitor. The good news is that contaminant levels here remain below EPA health standards, so they are not a cause for immediate concern.
These contaminants occur naturally and from human activity in this area. Arsenic and chloride leach from the limestone and rock layers that make up the Floridan aquifer system beneath the county. E. coli enters from surface sources like septic systems or animal waste that seep down into shallow wells. The combination of deep bedrock and distance from intensive development helps keep contamination low overall.
Groundwater in Baker County is moderately hard, driven by calcium and magnesium from the limestone bedrock below. This hardness is common across wells throughout the county because of the mineral-rich rock that supplies the Floridan aquifer system.
Wells in Baker County do not contain analytes at levels exceeding EPA health standards. However, arsenic, chloride, and E. coli bacteria show up in some county wells and deserve attention. Arsenic builds up in your body over time and can damage your kidneys and increase cancer risk. E. coli bacteria cause serious stomach illness. Chloride at elevated levels can affect people with heart or kidney problems.
The moderate hardness in Baker County wells creates practical problems around the house. You may see rust or orange stains on fixtures and laundry from iron in the water. Hard water also leaves scale buildup inside pipes and appliances, which can shorten the lifespan of water heaters and dishwashers. Clothes may feel stiff after washing, and soap does not lather as well.
We recommend testing your well to find out what is actually in it, because every well is different and yours may have higher or lower levels than the county average. Testing is the only way to know if treatment is needed to protect your family. A basic screen for bacteria and nitrate costs $50 to $100, while a comprehensive metals and minerals panel runs $200 to $400. Iron filters or water softeners can address hardness and iron concerns.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Nitrate | 37 | 0% | Moderate | Low | |
| Sulfate | 41 | 0% | Moderate | Low | |
| Manganese | 39 | 0% | Moderate | Low | |
| Lead | 26 | 0% | Moderate | Low | |
| Radon | 8 | 0% | Low | Low ⓘ | |
| Uranium | 26 | 0% | Moderate | Low | |
| Uranium | 26 | 0% | Moderate | Low | |
| Sulfate | 41 | 0% | Moderate | Low | |
| Radon | 8 | 0% | Low | Low ⓘ | |
| Nitrite | 33 | 0% | Moderate | Low | |
| Nitrate | 37 | 0% | Moderate | Low | |
| Manganese | 39 | 0% | Moderate | Low | |
| Lead | 26 | 0% | Moderate | Low | |
| Iron | 39 | 0% | Moderate | Low | |
| Sodium | 41 | — | Moderate | Low | |
| pH | 47 | — | Moderate | Low | |
| Hardness | 41 | — | Moderate | Low |
MCL = Maximum Contaminant Level (EPA limit for public water; used as benchmark for private wells). Distribution shows % of sampled wells in each concentration band. Methodology.
* Microbial contaminants (E. coli, coliform) reflect only samples from the last 10 years.
Data shows potential risk — a certified test confirms whether your water is affected.
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